text: /**
   * There's a list of file, since two files cannot have equal names,
   * the one which comes later will have a suffix (k),
   * where k is the smallest integer such that the found name is not used yet.
   *
   * Return an array of names that will be given to the files.
   *
   * @param {Array} names
   * @return {Array}
   *
   * @example
   * For input ["file", "file", "image", "file(1)", "file"],
   * the output should be ["file", "file(1)", "image", "file(1)(1)", "file(2)"]
   *
   */
  function renameFiles(names) {
    function filler(targetArr, el, n = 1) {
      let amount = n;
      const item = `${el}(${n})`;
      if (!targetArr.includes(el)) {
        targetArr.push(el);
      } else if (targetArr.includes(item)) {
        filler(targetArr, el, ++amount);
      } else {
        targetArr.push(item);
      }
    }
    const arr = [];
    names.forEach((el) => (
      filler(arr, el)
    ));
    return arr;
  }
  
  module.exports = renameFiles;
  